ATI RN · Obstetrics and Pediatrics · Pediatric Nursing Review Questions

Option D: usually occurs in preterm or near-term infants. Meconium aspiration syndrome (MAS) predominantly affects term or post-term infants rather than preterm ones, as these infants are more likely to pass meconium in utero due to stress or hypoxia.

Option A: (MAS) develops in 5% of meconium-stained infants. This statistic is accurate, as MAS occurs in approximately 5% of infants born with meconium-stained amniotic fluid.

Option B: 30% require mechanical ventilation. This is a factual statement, as around 30% of infants with MAS may need mechanical ventilation due to respiratory distress.

Option C: 3-5% die. This statistic reflects the mortality rate associated with MAS, which is indeed around 3-5%, indicating the severity of the condition.

Takeaways: Understanding that meconium aspiration syndrome primarily affects term or post-term infants is crucial, as it emphasizes the need for immediate assessment and intervention for airway obstruction and ventilation in affected newborns.

Option D: Hypertriglyceridemia is a key laboratory finding that distinguishes macrophage activation syndrome (MAS) from a flare of the primary disease. In MAS, triglyceride levels are often significantly elevated due to increased hepatic production and decreased clearance, which is not typically seen in disease flares. This makes it a critical test for diagnosis.

Option A: Leucopenia may occur in various conditions but does not specifically differentiate MAS from a flare of the primary disease, as both can present with altered white blood cell counts.

Option B: ESR (erythrocyte sedimentation rate) is a nonspecific marker of inflammation and does not provide a clear distinction between MAS and a flare of the underlying disease.

Option C: Failing hypofibrinogenemia can be seen in MAS, but it is not as definitive as hypertriglyceridemia for distinguishing MAS from other inflammatory processes.

Takeaways: Hypertriglyceridemia serves as a distinguishing laboratory marker for diagnosing macrophage activation syndrome, highlighting the importance of recognizing specific metabolic changes in inflammatory conditions for accurate diagnosis and management, especially in pediatric patients with complex presentations like MAS and underlying diseases.

Option C: IV calcium gluconate antagonizes the direct effects of hyperkalemia on the heart by stabilizing the cardiac membrane, thereby reducing the risk of arrhythmias associated with elevated potassium levels. This intervention is crucial in the acute management of hyperkalemia to protect the myocardium from the toxic effects of potassium.

Option A: Cation exchange resin primarily works by exchanging sodium for potassium in the gastrointestinal tract, which does not directly stabilize cardiac membranes or counteract the immediate cardiac effects of hyperkalemia.

Option B: Inhaled Beta 2 agonists can promote intracellular potassium shift but do not directly antagonize the cardiac effects of potassium on the heart, making them less effective in acute scenarios.

Option D: IV insulin/glucose mixture infusion helps lower serum potassium levels by driving potassium into cells, but it does not provide immediate stabilization of the cardiac membrane, which is essential in acute hyperkalemia management.

Takeaways: Effective management of hyperkalemia requires interventions that directly stabilize the cardiac membrane, such as IV calcium gluconate, to prevent serious complications like arrhythmias, especially in cases of severe hyperkalemia and cardiac risk.

Option A: Tuberous sclerosis does not share signs and symptoms with atopic dermatitis, making it the exception in the differential diagnosis. Tuberous sclerosis is a genetic disorder characterized by the growth of benign tumors in multiple organs, which presents with distinct clinical features that do not overlap with atopic dermatitis.

Option B: Pyridoxine deficiency can lead to dermatitis-like symptoms, including seborrheic dermatitis, which may mimic atopic dermatitis. This metabolic disorder is relevant in the differential diagnosis due to its skin manifestations.

Option C: Niacin deficiency, also known as pellagra, presents with dermatitis, diarrhea, and dementia. The skin lesions associated with niacin deficiency can resemble those of atopic dermatitis, thus making it a consideration in differential diagnosis.

Option D: Multiple carboxylase deficiency is a metabolic disorder that can present with skin rashes similar to atopic dermatitis. The overlap in symptoms makes it a relevant condition to consider when diagnosing skin disorders.

Takeaways: Understanding the differential diagnosis of atopic dermatitis is crucial, as conditions like pyridoxine and niacin deficiencies can present similarly, while tuberous sclerosis does not share these symptoms, highlighting the importance of accurate diagnosis in pediatric dermatology.

Option D: None of the above is a definitive statement indicating that all previous options are true regarding CNS leukemia. This condition is associated with a poor prognosis, increased intracranial pressure, and a high rate of relapse, making this option accurate in affirming the truth of the other statements.

Option A: Bad prognosis is a well-established fact in CNS leukemia, as it typically indicates a more severe disease course and lower survival rates compared to other leukemias.

Option B: Increased intracranial tension is a common complication in CNS leukemia due to leukemic infiltration and associated edema, leading to symptoms such as headaches and neurological deficits.

Option C: Relapse is common in CNS leukemia, with a significant percentage of patients experiencing recurrence after initial treatment, highlighting the aggressive nature of this disease.

Takeaways: Understanding the characteristics of CNS leukemia, including its poor prognosis, common increased intracranial pressure, and frequent relapses, is essential for effective management and requires ongoing monitoring and supportive care throughout treatment.